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Schweizerische Gemmologische Gesellschaft
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Two-phase inclusions in tourmaline from Namibia
Two-phase inclusions in sapphire, Sri Lanka
Dendrites in agate
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Fire opal, Mexico
Spinel crystal in dolomite marble, Burma
Partially etched diamond crystal
Agate from Anzi, Maroc

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© SGG/SSG 2021

 

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